Reaper Performance meter VS actual CPU usage.

[lalalandsynth]

My plugin shows 0.4% cpu usage in Reaper Performance meter , but almost 17% in my task manager.
Just wondering why the discrepancy ?

[adamszabo]

Because the cpu meter doesnt account for multi-core. It only shows the CPU of 1 core I believe. The new FlowStones should fix that

[lalalandsynth]

I see , thanks!

[tulamide]

You can't mix all the different sources!

Reaper itself is known to show more "optimistic" values than the Task Manager. But the latter doesn't just show pure thread performance, but also takes into account small details that lock the CPU without really using it. And Flowstone shows only pure audio processing, it completely ignores everything else, like graphics performance, user input, etc.

If you want to know how your plugin performs, the only way is to do the same things on your plugin and a plugin that you consider lightweight, and then compare the numbers on one performance meter. The difference as a percentage will give you a hint. You won't get closer to the real performance than this.

[lalalandsynth]

Also, I have wondered why a plugin say takes 12% and then I add another instance of the same plugin , almost no CPU increase , why is that ?